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Q32: To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
have to know a great deal more than now about the social and economic have to know a great deal more than they do now about the social and economical would have to know a great deal more than they do now about the social and economical would have to know a great deal more than they do now about the social and economic would have to know a great deal more than now about the social and economic
新东方的答案是D, 综合比较结构和词义上的差别,综合会选择D. 但是对于have to 和would have to 的运用不明白,非得用虚拟么? 请教各位大虾 |
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